4,7-Dichloro-3-methylquinoline CAS 6622-28-2
| CAS No. | 6622-28-2 |
| Molecular Formula | C4H5Cl3O2S2 |
| Molecular Weight | 255.57 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
4,7-Dichloro-3-methylquinoline (CAS 6622-28-2), molecular formula C4H5Cl3O2S2 and molecular weight 255.57 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C4H5Cl3O2S2, 4,7-Dichloro-3-methylquinoline contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 255.57 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C4H5Cl3O2S2 |
| Molecular Weight | 255.57 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 2 |
Related Dichloro Standards
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- 6,8-Dichloro-2-propylquinolin-4-amine (CAS 1189105-48-3)
- 5,7-Dichloro-2-propylquinolin-4-amine (CAS 1189106-39-5)
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Recommended Standards
- p-Toluic acid hydrazide (CAS 90617-76-8)
- 3-chloro-6-(2,2,2-trifluoroethoxy)pyridine-2-carboxylic acid (CAS 1021043-31-1)
- N-(2,4,6-Trichlorophenyl)thiourea (CAS 31118-87-3)
- 3-Chloro-2-methoxy-5-(trifluoromethyl)isonicotinic acid (CAS 1221792-35-3)
- 204185-91-1 Caesalmin E (CAS 204185-91-1)
- 4,5-Dichloro-2-methyl-1H-indole (CAS 479422-01-0)
- 1-(3-Phenyl-4,5-dihydroisoxazol-5-yl)ethanone (CAS 54606-00-7)
- 6-Chloro-4-phenyl-2-(pyrrolidin-1-yl)quinazoline (CAS 332867-60-4)
- Nitronium hexafluorophosphate, 95% (CAS 19200-21-6)
- 2-Methyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidine (CAS 1282597-36-7)
- Dapagliflozin Impurity 166 (CAS CATO-C4X-1138166)
- 2,2'-(4,4-Dihexyl-4H-cyclopenta[2,1-b:3,4-b']dithiophene-2,6-diyl)bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolane) (CAS 1220888-44-7)
- 2,4-Dichlorobenzimidamide (CAS 63124-43-6)
- Insulin Degludec impurity 4 (CAS CATO-C4X-21574)
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